Power saving for isochronous data streams in a computer system

Details Power saving for isochronous data streams in a computer system Power saving for isochronous data streams in a computer system

2006-12-04

2009-11-17

Cao, Chun (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C713S320000, C713S323000

Reexamination Certificate

active

07620833

ABSTRACT:
For isochronous data steams processed by a computer system, for example high definition audio streams, embodiments keep track of the free space available in the input and output buffers for the data streams. The available free space in the buffers determines whether various low power entry and exit thresholds are met or not. If all low power entry thresholds are met, then various circuits such as clocks, phase locked loops, and direct media interface links, may be put into a low power state, and the data stream controller enters an idle window so that memory requests are not serviced. During this time, system DRAM may begin refresh. Once the low power state has been entered into, if any exit threshold is met, then the low power state is ended. Other embodiments are described and claimed.

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patent: 2006/0120462 (2006-06-01), Tsuboi
patent: 2006/0159093 (2006-07-01), Joo et al.

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